<template>
  <div class="login_container">
    <el-row>
      <!-- 登录的表单 -->
      <el-form
        class="login_form"
        :model="loginForm"
        :rules="rules"
        ref="loginForms"
      >
        <h1>Hello</h1>
        <h2>欢迎来到硅谷甄选</h2>
        <el-form-item prop="username">
          <el-input :prefix-icon="User" v-model="loginForm.username"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            type="password"
            :prefix-icon="Lock"
            v-model="loginForm.password"
            show-password
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button
            :loading="loading"
            class="login_btn"
            type="primary"
            size="default"
            @click="login"
          >
            登录
          </el-button>
        </el-form-item>
      </el-form>
    </el-row>
  </div>
</template>

<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue'
import { reactive, ref } from 'vue'
// 消息提示框
import { ElNotification } from 'element-plus'
// 引入获取当前时间的函数
import { getTime } from '@/utils/time'
// 引入用户相关的小仓库
import useUserStore from '@/store/modules/user'
let useStore = useUserStore()
// 引入路由
import { useRouter } from 'vue-router'
let $router = useRouter()

let loading = ref(false)
let loginForm = reactive({ username: 'admin', password: '111111' })
// 获取el-form组件
let loginForms = ref()
// 登录按钮的回调
const login = async () => {
  //保证全部表单相校验通过再发请求
  await loginForms.value.validate()
  //加载效果:开始加载
  loading.value = true
  // 点击登录按钮以后
  // 通知仓库发登录请求
  // 请求成功，首页展示数据的地方
  // 请求失败，弹出登录失败的信息
  try {
    await useStore.userLogin(loginForm)
    $router.push('/')
    //登录成功提示信息
    ElNotification({
      type: 'success',
      message: '欢迎回来',
      title: `Hi,${getTime()}好！`,
    })
    //登录成功加载效果也消失
    loading.value = false
  } catch (error) {
    console.log(error)
    //登录失败加载效果消息
    loading.value = false
    //登录失败的提示信息
    ElNotification({
      type: 'error',
      message: (error as Error).message,
    })
  }
}

// 自定义校验规则函数--username
const validatorUserName = (rule: any, value: any, callback: any) => {
  if (value.length >= 5) {
    callback()
  } else {
    callback(new Error('账号长度至少是5位'))
  }
}
// 自定义校验规则函数--password
const validatorPassword = (rule: any, value: any, callback: any) => {
  if (value.length >= 6) {
    callback()
  } else {
    callback(new Error('密码长度至少六位'))
  }
}
// 定义表单校验需要配置对象
const rules = {
  username: [{ trigger: 'change', validator: validatorUserName }],
  password: [{ trigger: 'change', validator: validatorPassword }],
}
</script>

<style scoped lang="scss">
.login_container {
  width: 100%;
  height: 100vh;
  background: url('@/assets/images/background.jpg') no-repeat;
  background-size: cover;

  .login_form {
    position: relative;
    width: 35%;
    height: 40vh;
    top: 30vh;
    left: 55vw;
    background: url('@/assets/images/login_form.png') no-repeat;
    background-size: 100%;
    padding: 20px;

    h1 {
      color: white;
      font-size: 40px;
    }

    h2 {
      font-size: 20px;
      color: white;
      margin: 20px 0px;
    }

    .login_btn {
      width: 100%;
    }
  }
}
</style>